Radiation curable composition comprising hydrophilic nanoparticles

A barrier stack for protection of a sensitive device against moisture, comprising:

• an organic layer comprising a curable material and hydrophilic nanoparticles, wherein the proportion of hydrophilic nanoparticles is in the range of 0.01 wt % to 0.9 wt % of the weight of the curable material, and wherein the hydrophilic nanoparticles comprise metal, metal oxide, metalloid, metalloid oxide, metal carbide, metalloid carbide, metal halide, metal salts, metal perchlorate, metal nitride, metalloid nitride, metal oxygen nitride, metalloid oxygen nitride, metal oxygen boride, or metalloid oxygen boride particles;
• and
• at least one inorganic layer coupled to the organic layer, the at least one inorganic layer configured to be positionable closer to the sensitive device than the organic layer.